简介:Customers'satisfactionwithservicesisreflectedbyqualityofexperience(QoE).Insofar,moststudiesoncooperativecommunicationhavebeenfocusedonimprovingtheQoEofsourceusers.However,theimprovementofasourceuser'sQoEisobtainedatcostofdegradationoftherelayuser'sQoE.Ontheotherhand,cooperativecommunicationscanachieveperformancesimilartothatofaconventionalmultiple-inputmultiple-output(MIMO)systembyformingvirtualMIMOarrays.Hence,toimprovetheQoEperformanceofrelayusers,thisarticleproposestheconceptofabeliefthresholdatthedestinationuserandanewcooperativeschemebasedonthebeliefthresholddestination(BTD)technique,whilewithoutdecayingtheBERperformanceofthecommunicationsystem.
简介:中国宽带市场几经风雨,2001年喧嚣一时,2002年几近沉寂,终于,在2003年的这个时节突然显现出空前的活力。用户数量雪崩式激增,宽带运营商难以掩饰乐观的情绪,更对这个市场充满美好的预期。在一片空前的喝彩声中,中国网通与中国电信的两大宽带应用平台相继启动,运营商正在以主导者的身份调动宽带